协作蜂窝小区上行链路的中继选择与功率分配  

Relay selection and power allocation for the uplink in cooperative cellular networks

作　　者：郭超平[1,2] 韩鹍 张晓龙[1] 李勇朝[1] 张海林[1] 

机构地区：[1]西安电子科技大学综合业务网理论及关键技术国家重点实验室,陕西西安710071 [2]西安通信学院,陕西西安710106

出　　处：《西安电子科技大学学报》2012年第3期27-33,42,共8页Journal of Xidian University

基　　金：国家自然科学基金资助项目(61072069);国家科技重大专项基金资助项目(2011ZX03003-001-04,2012ZX03003-012);西安电子科技大学基本科研业务费资助项目(72001859);国家重点实验室专项基金资助项目(ISN090105);国家111计划资助项目(B08038)

摘　　要：为了最小化能量受限的协作蜂窝小区的总代价,提出了上行链路的功率和中继等资源分配的模型.该模型是一个非线性约束、{0,1}组合优化问题,因而提出了一种自适应的资源分配方案对其求解.针对给定中继节点集合,该方案分别为每个源节点选择总代价最小的中继;而对于给定源和中继对,提出了最小化二者总代价的基于图论的最优功率分配算法.通过仿真和分析表明,该方案近似最优,能够发送更多的数据量,延长网络的寿命.An assignment model of uplink resources, namely, power and relay, is proposed to minimize the total cost of energy-constrained cooperative networks. The model is a non-linear constraint, 0-1 integer programmirtg problem. An adaptive resource allocation scheme is presented to solve it, which selects the relay with the lowest total cost {or each source from the given relay set. A graphic-theory-based optimal power allocation algorithm is presented to minimize their total cost for a given source-relay pair. Simulation and analysis show that the scheme is suboptimal and can transmit more data than other algorithms and prolong network lifetime.

关 键 词：协作通信 资源分配 放大转发 功率分配 中继选择 代价 

分 类 号：TN929.5[电子电信—通信与信息系统]